{"id":38910,"date":"2026-10-29T03:01:31","date_gmt":"2026-10-29T03:01:31","guid":{"rendered":"https:\/\/dinghongtransformer.com\/?p=38910"},"modified":"2026-10-29T03:01:34","modified_gmt":"2026-10-29T03:01:34","slug":"transformer-fat-vs-sat-testing-checklist","status":"publish","type":"post","link":"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/","title":{"rendered":"Transformer FAT vs SAT: Testing Checklist, Required Documents &amp; Buyer Responsibilities"},"content":{"rendered":"<p class=\"wp-block-wd-paragraph wd-a32841fe\">A transformer can pass every factory test and still face problems during installation or commissioning.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8f0b3be1\">Transport damage, incorrect connections, protection-setting errors, moisture ingress, or site wiring issues may only become apparent after the equipment arrives.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a8f6e156\">That is why transformer procurement should include two distinct acceptance stages: <em><strong><a href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-replacement\/\" data-type=\"post\" data-id=\"38815\">Factory Acceptance Testing (FAT)<\/a> <\/strong><\/em>and <strong><em><a href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-factory-acceptance-testing-what-buyers-should-expect-before-shipment\/\" data-type=\"post\" data-id=\"38609\">Site Acceptance Testing (SAT)<\/a>.<\/em><\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-85941f63\">For utilities, industrial plants, <strong><em><a href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/industry-standards\/iec-ansi-ieee-gb-and-nema-what-transformer-buyers-should-know-before-placing-an-order\/\" data-type=\"post\" data-id=\"37078\">EPC contractors<\/a><\/em><\/strong>, and <a href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/ethiopia-amhara-rural-power-grid-upgrade-project\/\" data-type=\"post\" data-id=\"37370\"><strong><em>distribution projects in Ethiopia<\/em><\/strong><\/a>, Thailand, Vietnam, Uzbekistan, Nigeria, Ukraine, Myanmar, and Russia, understanding the difference between FAT and SAT can help prevent disputes, reduce commissioning delays, and establish clear acceptance responsibilities.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e5e046e6\">This guide explains the scope of both testing stages, typical technical requirements, essential documents, and the information buyers should confirm before requesting a transformer quotation.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#1_What_Is_the_Difference_Between_Transformer_FAT_and_SAT\" >1. What Is the Difference Between Transformer FAT and SAT?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#2_What_Should_Be_Included_in_Transformer_FAT\" >2. What Should Be Included in Transformer FAT?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#Example_FAT_Specification\" >Example FAT Specification<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#3_What_Should_Be_Included_in_Transformer_SAT\" >3. What Should Be Included in Transformer SAT?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#Why_FAT_Results_Matter_During_SAT\" >Why FAT Results Matter During SAT<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#4_Factory_and_Site_Test_Documents_Buyers_Should_Request\" >4. Factory and Site Test Documents Buyers Should Request<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#5_Who_Is_Responsible_for_FAT_and_SAT\" >5. Who Is Responsible for FAT and SAT?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#Three_Responsibilities_to_Define_Before_Ordering\" >Three Responsibilities to Define Before Ordering<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#6_Real_DHDL_Project_63MVA_Transformer_Supply_in_Ethiopia\" >6. Real DHDL Project: 63MVA Transformer Supply in Ethiopia<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#Published_Project_Information\" >Published Project Information<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#What_Buyers_Can_Learn_from_This_Project\" >What Buyers Can Learn from This Project<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#7_FAT_and_SAT_Requirements_for_Different_Target_Markets\" >7. FAT and SAT Requirements for Different Target Markets<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#8_Hidden_FAT_and_SAT_Costs_Buyers_Often_Overlook\" >8. Hidden FAT and SAT Costs Buyers Often Overlook<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#Third-Party_Inspection_Costs\" >Third-Party Inspection Costs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#Repeat_Testing_and_Nonconformities\" >Repeat Testing and Nonconformities<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#Shipping_and_Storage_Conditions\" >Shipping and Storage Conditions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#Site_Test_Equipment\" >Site Test Equipment<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#Energization_Delays\" >Energization Delays<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#9_Transformer_FAT_and_SAT_RFQ_Checklist\" >9. Transformer FAT and SAT RFQ Checklist<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#Documents_to_Attach_to_the_RFQ\" >Documents to Attach to the RFQ<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-fat-vs-sat-testing-checklist\/#10_DHDL_Transformer_Testing_and_Quality_Control\" >10. DHDL Transformer Testing and Quality Control<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-wd-title title wd-feb8f485\"><span class=\"ez-toc-section\" id=\"1_What_Is_the_Difference_Between_Transformer_FAT_and_SAT\"><\/span>1. What Is the Difference Between Transformer FAT and SAT?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ea4f6b42\">Factory Acceptance Testing (FAT) is performed at the manufacturer&#8217;s facility before shipment. It verifies that the transformer meets the agreed design specifications, manufacturing requirements, and applicable factory test criteria.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0e1acc7f\">Site Acceptance Testing (SAT) is performed after delivery and installation. It verifies the transformer&#8217;s condition, installation, connections, protection interfaces, and readiness for energization.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Item<\/th><th>Factory Acceptance Testing (FAT)<\/th><th>Site Acceptance Testing (SAT)<\/th><\/tr><tr><td>Location<\/td><td>Manufacturer&#8217;s Factory<\/td><td>Project Installation Site<\/td><\/tr><tr><td>Main Purpose<\/td><td>Verify Manufactured Equipment<\/td><td>Verify Installed Equipment<\/td><\/tr><tr><td>Timing<\/td><td>Before Shipment<\/td><td>After Installation, Before Energization<\/td><\/tr><tr><td>Typical Participants<\/td><td>Manufacturer, Buyer, Inspector<\/td><td>EPC, Installation Team, Owner, Commissioning Engineer<\/td><\/tr><tr><td>Key Focus<\/td><td>Electrical Performance and Compliance<\/td><td>Transport Condition, Connections, Protection, Installation<\/td><\/tr><tr><td>Main Documents<\/td><td>Factory Test Reports, FAT Records<\/td><td>Site Test Reports, Commissioning Records<\/td><\/tr><tr><td>Acceptance Result<\/td><td>Release for Shipment<\/td><td>Approval to Proceed Toward Energization<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-64ce0dc9\">Important: Passing FAT does not automatically mean the transformer is ready to energize.<\/p>\n\n\n\n<div class=\"wp-block-wd-image wd-block-image wd-f307aa51\"><img decoding=\"async\" width=\"1672\" height=\"941\" class=\"wp-image-38912 lazyload\" data-src=\"https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/transformer-fat-vs-sat-testing-checklist.png\" alt=\"\" data-srcset=\"https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/transformer-fat-vs-sat-testing-checklist.png 1672w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/transformer-fat-vs-sat-testing-checklist-400x225.png 400w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/transformer-fat-vs-sat-testing-checklist-1300x732.png 1300w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/transformer-fat-vs-sat-testing-checklist-768x432.png 768w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/transformer-fat-vs-sat-testing-checklist-1536x864.png 1536w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/transformer-fat-vs-sat-testing-checklist-18x10.png 18w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/transformer-fat-vs-sat-testing-checklist-430x242.png 430w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/transformer-fat-vs-sat-testing-checklist-700x394.png 700w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/transformer-fat-vs-sat-testing-checklist-150x84.png 150w\" data-sizes=\"(max-width: 1672px) 100vw, 1672px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1672px; --smush-placeholder-aspect-ratio: 1672\/941;\" \/><\/div>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-298db0c8\">Likewise, SAT should not be treated as a complete replacement for the manufacturer&#8217;s factory testing.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-de1f9363\"><span class=\"ez-toc-section\" id=\"2_What_Should_Be_Included_in_Transformer_FAT\"><\/span>2. What Should Be Included in Transformer FAT?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-87f500e2\">The exact FAT scope depends on transformer type, voltage class, applicable standards, and the purchase contract.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7f266837\">For <strong><em><a href=\"https:\/\/dinghongtransformer.com\/vi\/product\/66kv-high-voltage-oil-immersed-power-transformer\/\" data-type=\"product\" data-id=\"37438\">oil-immersed<\/a><\/em><\/strong> and <strong><em><a href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/what-is-a-dry-type-transformer-and-where-is-it-used\/\" data-type=\"post\" data-id=\"38324\">dry-type transformers<\/a><\/em><\/strong>, routine factory testing commonly includes the following checks.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>FAT Test<\/th><th>Purpose<\/th><th>Typical Reference<\/th><\/tr><tr><td>Winding Resistance<\/td><td>Check winding and connection integrity<\/td><td>IEC 60076 Series<\/td><\/tr><tr><td>Voltage Ratio<\/td><td>Verify HV\/LV ratio and tap positions<\/td><td>IEC 60076-1<\/td><\/tr><tr><td>Vector Group \/ Phase Displacement<\/td><td>Confirm winding connection<\/td><td>IEC 60076-1<\/td><\/tr><tr><td>No-Load Loss and Current<\/td><td>Verify core-related performance<\/td><td>IEC 60076-1<\/td><\/tr><tr><td>Load Loss and Impedance<\/td><td>Verify electrical performance<\/td><td>IEC 60076-1<\/td><\/tr><tr><td>Applied Voltage Withstand<\/td><td>Check insulation withstand<\/td><td>IEC 60076-3<\/td><\/tr><tr><td>Induced Voltage Test<\/td><td>Check insulation under induced voltage<\/td><td>IEC 60076-3<\/td><\/tr><tr><td>Insulation Checks<\/td><td>Evaluate insulation condition<\/td><td>Applicable Test Procedure<\/td><\/tr><tr><td>Functional Checks<\/td><td>Verify accessories and controls<\/td><td>Approved FAT Procedure<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-58d5b285\">Additional type or special tests may include temperature-rise testing, lightning impulse testing, sound-level measurement, or other project-specific tests.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-842bfc24\">These should be agreed before manufacturing.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-9d9d6581\"><span class=\"ez-toc-section\" id=\"Example_FAT_Specification\"><\/span>Example FAT Specification<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4d86aebd\">For an illustrative 2,500kVA oil-immersed distribution transformer:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Parameter<\/th><th>Example Requirement<\/th><\/tr><tr><td>Rated Capacity<\/td><td>2,500kVA<\/td><\/tr><tr><td>HV Voltage<\/td><td>11kV<\/td><\/tr><tr><td>LV Voltage<\/td><td>0.4kV<\/td><\/tr><tr><td>Frequency<\/td><td>50Hz<\/td><\/tr><tr><td>Vector Group<\/td><td>Dyn11<\/td><\/tr><tr><td>Cooling<\/td><td>ONAN<\/td><\/tr><tr><td>Tap Range<\/td><td>\u00b12 \u00d7 2.5%<\/td><\/tr><tr><td>Applicable Standard<\/td><td>IEC 60076 Series<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-df31fcb5\">The FAT report should confirm the actual measured values and compare them against the approved specifications and applicable acceptance criteria.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c0957b87\">Hidden procurement risk: A supplier&#8217;s statement that a transformer is \u201c100% tested\u201d does not define which tests were performed or what acceptance limits were applied.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c3b4f99d\">Buyers should request a detailed FAT test list before placing the order.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-98384234\"><span class=\"ez-toc-section\" id=\"3_What_Should_Be_Included_in_Transformer_SAT\"><\/span>3. What Should Be Included in Transformer SAT?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a5f162ad\">Site Acceptance Testing focuses on the condition and integration of the transformer after transportation and installation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-764e4489\">Unlike FAT, site testing must account for the actual installation environment, electrical connections, protection system, and local commissioning requirements.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1ee4cde4\">A typical SAT scope may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Visual inspection for transportation damage<\/li>\n\n\n\n<li>Nameplate and serial number verification<\/li>\n\n\n\n<li>Foundation, mounting and clearance checks<\/li>\n\n\n\n<li>HV\/LV cable and busbar connection inspection<\/li>\n\n\n\n<li>Grounding and earthing verification<\/li>\n\n\n\n<li>Insulation resistance measurements<\/li>\n\n\n\n<li>Winding resistance and transformer ratio checks, where required<\/li>\n\n\n\n<li>Insulating oil checks for oil-immersed units<\/li>\n\n\n\n<li>Cooling fan, alarm and accessory functional tests<\/li>\n\n\n\n<li>Protection relay and trip-circuit verification<\/li>\n\n\n\n<li>Tap changer position and operation checks<\/li>\n\n\n\n<li>Pre-energization inspection and authorization<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e62c4dc2\">The exact tests and test voltages must follow the approved commissioning procedure. Factory dielectric withstand tests should not be repeated on site without specific engineering justification and an approved procedure.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-91f77da2\"><span class=\"ez-toc-section\" id=\"Why_FAT_Results_Matter_During_SAT\"><\/span>Why FAT Results Matter During SAT<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a7a0ffe9\">Suppose a transformer passes its factory winding-resistance and voltage-ratio tests.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-36f841fb\">After transportation, the site commissioning team detects an unexpected difference in a measurement.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bcfd1a1f\">The team should compare the site result with the original FAT report, accounting for temperature, tap position, test method, and instrument accuracy.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-159ea3ec\">This comparison helps identify whether further investigation is needed.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1fb6b225\">It does not automatically prove that transportation damage or manufacturing defects caused the difference.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-315a477b\"><span class=\"ez-toc-section\" id=\"4_Factory_and_Site_Test_Documents_Buyers_Should_Request\"><\/span>4. Factory and Site Test Documents Buyers Should Request<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-530bd4ed\">Missing documents can delay equipment approval even when the transformer is technically acceptable.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Document<\/th><th>FAT Stage<\/th><th>SAT Stage<\/th><\/tr><tr><td>Approved Technical Datasheet<\/td><td>Required<\/td><td>Reference<\/td><\/tr><tr><td>General Arrangement Drawing<\/td><td>Required<\/td><td>Reference<\/td><\/tr><tr><td>Nameplate Drawing<\/td><td>Required<\/td><td>Verify<\/td><\/tr><tr><td>Inspection and Test Plan (ITP)<\/td><td>Required<\/td><td>Reference<\/td><\/tr><tr><td>Routine Test Reports<\/td><td>Required<\/td><td>Reference<\/td><\/tr><tr><td>Type Test Reports<\/td><td>If Specified<\/td><td>Reference<\/td><\/tr><tr><td>Calibration Certificates<\/td><td>As Required<\/td><td>As Required<\/td><\/tr><tr><td>Packing List<\/td><td>Before Shipment<\/td><td>Verify on Arrival<\/td><\/tr><tr><td>Transport Inspection Record<\/td><td>\u2014<\/td><td>Required<\/td><\/tr><tr><td>Installation Checklist<\/td><td>\u2014<\/td><td>Required<\/td><\/tr><tr><td>Site Electrical Test Reports<\/td><td>\u2014<\/td><td>Required<\/td><\/tr><tr><td>Protection and Alarm Test Records<\/td><td>\u2014<\/td><td>Required<\/td><\/tr><tr><td>Commissioning Certificate<\/td><td>\u2014<\/td><td>As Contractually Required<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-701ddf9b\">A useful document package should identify the transformer serial number, test date, measured values, applicable acceptance criteria, test equipment, and responsible personnel.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a5b20406\">DHDL&#8217;s existing FAT guide specifically discusses winding resistance, voltage ratio, insulation tests, losses, impedance, oil and accessories, and documentation before shipment. <\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-a4726a63\"><span class=\"ez-toc-section\" id=\"5_Who_Is_Responsible_for_FAT_and_SAT\"><\/span>5. Who Is Responsible for FAT and SAT?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-73ea2f5f\">One of the most common sources of disagreement is assuming that the transformer manufacturer is responsible for every activity up to energization.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-807e1629\">In practice, responsibilities depend on the supply contract.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6a02b692\">The following is an illustrative responsibility matrix, not a statement of DHDL&#8217;s standard contractual terms.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Activity<\/th><th>Manufacturer<\/th><th>Buyer \/ EPC<\/th><th>Independent Inspector<\/th><\/tr><tr><td>Manufacturing Quality Control<\/td><td>Lead<\/td><td>Review<\/td><td>If Appointed<\/td><\/tr><tr><td>FAT Test Execution<\/td><td>Lead<\/td><td>Witness \/ Review<\/td><td>Witness if Contracted<\/td><\/tr><tr><td>FAT Report Submission<\/td><td>Lead<\/td><td>Approve \/ Review<\/td><td>Verify if Contracted<\/td><\/tr><tr><td>Export Packing<\/td><td>As Contracted<\/td><td>Confirm Requirements<\/td><td>Inspect if Contracted<\/td><\/tr><tr><td>Transport and Unloading<\/td><td>As Contracted<\/td><td>Coordinate<\/td><td>\u2014<\/td><\/tr><tr><td>Foundation and Installation<\/td><td>Technical Support if Contracted<\/td><td>Usually Lead<\/td><td>\u2014<\/td><\/tr><tr><td>SAT Execution<\/td><td>Support if Contracted<\/td><td>Usually Lead<\/td><td>If Appointed<\/td><\/tr><tr><td>Protection Coordination<\/td><td>Supply Equipment Data<\/td><td>System Engineering Lead<\/td><td>\u2014<\/td><\/tr><tr><td>Energization Authorization<\/td><td>Technical Support<\/td><td>Owner \/ Authorized Operator<\/td><td>As Required<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-5c71a392\"><span class=\"ez-toc-section\" id=\"Three_Responsibilities_to_Define_Before_Ordering\"><\/span>Three Responsibilities to Define Before Ordering<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4d130bff\">1. FAT witness arrangements<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2d98be5a\">Will the buyer attend in person, appoint an independent inspector, or review recorded test evidence?<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ea4468ce\">2. SAT execution and technical support<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fbc6b3ea\">Who supplies test instruments, performs site tests, resolves nonconformities, and signs the commissioning records?<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6c35c869\">3. Acceptance and payment milestones<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-977c3c9b\">Does payment depend on FAT approval, shipment, site delivery, SAT completion, or another contractually defined milestone?<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-799d8f30\">Hidden procurement risk: A purchase agreement that only states \u201cFAT included\u201d may not include travel costs, third-party witness fees, repeat tests, or site commissioning support.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-621b70d1\"><span class=\"ez-toc-section\" id=\"6_Real_DHDL_Project_63MVA_Transformer_Supply_in_Ethiopia\"><\/span>6. Real DHDL Project: <a href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/ethiopia-amhara-rural-power-grid-upgrade-project\/\" data-type=\"post\" data-id=\"37370\"><em>63MVA Transformer Supply in Ethiopia<\/em><\/a><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-59bac0a3\">DHDL&#8217;s published Ethiopia project provides a relevant example of why factory testing, export documentation, and overseas installation coordination matter.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7a48e353\">The project involved supplying oil-immersed transformers for industrial facilities and regional power distribution infrastructure.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-d9ab4d12\"><span class=\"ez-toc-section\" id=\"Published_Project_Information\"><\/span>Published Project Information<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Project Parameter<\/th><th>DHDL Published Data<\/th><\/tr><tr><td>Destination<\/td><td>Ethiopia<\/td><\/tr><tr><td>Application<\/td><td>Industrial and Regional Power Distribution<\/td><\/tr><tr><td>Transformer Quantity<\/td><td>20 Units<\/td><\/tr><tr><td>Individual Capacity<\/td><td>3,150kVA<\/td><\/tr><tr><td>Combined Capacity<\/td><td>63MVA<\/td><\/tr><tr><td>Transformer Type<\/td><td>Oil-Immersed<\/td><\/tr><tr><td>Project Activities<\/td><td>Manufacturing, Factory Testing, Export Delivery and Technical Support<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f0f2444c\">DHDL reports that the transformers were delivered and placed into operation, with manufacturing coordination, factory testing, export packaging, and installation support forming part of the project delivery process. Dinghongtransformer<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6c1ba270\">The published project information does not provide individual FAT measurement results, SAT records, or detailed acceptance criteria. Therefore, it should not be presented as evidence that a particular site test procedure was performed.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-97348315\"><span class=\"ez-toc-section\" id=\"What_Buyers_Can_Learn_from_This_Project\"><\/span>What Buyers Can Learn from This Project<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-61ef063d\">For a multi-unit transformer project, acceptance planning should cover more than a single factory inspection.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c58df5df\">Buyers should confirm:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Whether each transformer has an individual routine test report<\/li>\n\n\n\n<li>Whether test reports identify matching serial numbers<\/li>\n\n\n\n<li>How factory inspection and shipment release are documented<\/li>\n\n\n\n<li>Whether shipping damage is checked upon arrival<\/li>\n\n\n\n<li>Who provides installation guidance and commissioning support<\/li>\n\n\n\n<li>How nonconformities are reported and resolved<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-42a17339\">These requirements are relevant to distribution projects in Ethiopia, Nigeria, Vietnam, Thailand, and Uzbekistan, particularly when multiple transformers are delivered in batches.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-95ba6f71\"><span class=\"ez-toc-section\" id=\"7_FAT_and_SAT_Requirements_for_Different_Target_Markets\"><\/span>7. FAT and SAT Requirements for Different Target Markets<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7efcd529\">DHDL&#8217;s target markets have different project environments, utility requirements, and logistics conditions.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c2f52d0a\">The following considerations are intended for <strong><em><a href=\"https:\/\/dinghongtransformer.com\/vi\/blog\/case-studies\/transformer-replacement\/\" data-type=\"post\" data-id=\"38815\">RFQ preparation<\/a><\/em><\/strong>. They are not substitutes for local standards or project-specific commissioning procedures.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Market<\/th><th>FAT and SAT Planning Priorities<\/th><\/tr><tr><td>Ukraine<\/td><td>Cold-weather design verification, transport inspection, utility approval and documentation<\/td><\/tr><tr><td>Ethiopia<\/td><td>Altitude, dust, site access, transport condition and installation testing<\/td><\/tr><tr><td>Vietnam<\/td><td>Humidity, moisture ingress, corrosion exposure and insulation checks<\/td><\/tr><tr><td>Thailand<\/td><td>High ambient temperature, cooling accessories, humidity and site wiring<\/td><\/tr><tr><td>Myanmar<\/td><td>Moisture protection, transport handling, site access and maintenance capability<\/td><\/tr><tr><td>Uzbekistan<\/td><td>Seasonal temperatures, dust, tap changer checks and transport conditions<\/td><\/tr><tr><td>Russia<\/td><td>Low-temperature suitability, insulating oil specification and local acceptance requirements<\/td><\/tr><tr><td>Nigeria<\/td><td>Site temperature, dust, grounding, protection coordination and power-quality conditions<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bb97be89\">For example, a transformer delivered to a high-altitude project in Ethiopia may require different design verification from equipment installed at a low-altitude industrial site in Thailand.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-519bb824\">Likewise, an outdoor transformer installed in coastal Vietnam may need additional attention to corrosion protection and moisture exposure.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-65d15ab7\">The buyer should specify these conditions during the RFQ stage so that both factory verification and site inspection requirements can be planned accordingly.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-a5b48b5f\"><span class=\"ez-toc-section\" id=\"8_Hidden_FAT_and_SAT_Costs_Buyers_Often_Overlook\"><\/span>8. Hidden FAT and SAT Costs Buyers Often Overlook<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-f2bc769b\"><span class=\"ez-toc-section\" id=\"Third-Party_Inspection_Costs\"><\/span>Third-Party Inspection Costs<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3bf4a051\">If an EPC contractor requires independent FAT witnessing, confirm who pays for inspection fees, travel, accommodation, and any additional testing.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-564975f1\"><span class=\"ez-toc-section\" id=\"Repeat_Testing_and_Nonconformities\"><\/span>Repeat Testing and Nonconformities<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8a12da5c\">The contract should explain what happens when test results fall outside agreed acceptance criteria.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ba6a0c86\">It should identify who investigates the issue, who pays for repeat tests, and how the corrected equipment is released.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-8c9cbfd2\"><span class=\"ez-toc-section\" id=\"Shipping_and_Storage_Conditions\"><\/span>Shipping and Storage Conditions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bf77f307\">Large oil-immersed transformers may require special transportation, handling, storage, or reassembly arrangements.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cff75c23\">Where accessories are shipped separately or insulating oil is handled on site, the installation and testing scope must reflect those activities.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-84865800\"><span class=\"ez-toc-section\" id=\"Site_Test_Equipment\"><\/span>Site Test Equipment<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cfea14f7\">The commissioning team may need insulation testers, winding-resistance meters, transformer ratio testers, grounding test instruments, and protection test equipment.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2c0986b5\">Instrument availability and calibration should be confirmed before mobilization.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-fa34726a\"><span class=\"ez-toc-section\" id=\"Energization_Delays\"><\/span>Energization Delays<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1413c359\">A transformer can pass SAT but remain unenergized because the utility connection, protection coordination, or operating authorization is incomplete.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b0f7e42e\">Buyer tip: Treat FAT approval, delivery acceptance, SAT completion, and permission to energize as separate project milestones.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-89bd502b\"><span class=\"ez-toc-section\" id=\"9_Transformer_FAT_and_SAT_RFQ_Checklist\"><\/span>9. Transformer FAT and SAT RFQ Checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d9728a20\">Before requesting a quotation, define both the equipment specifications and the acceptance requirements.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>RFQ Item<\/th><th>Buyer Input<\/th><\/tr><tr><td>Destination Country<\/td><td>__________<\/td><\/tr><tr><td>Project Application<\/td><td>Utility \/ Industrial \/ Substation<\/td><\/tr><tr><td>Transformer Type<\/td><td>Oil-Immersed \/ Dry-Type<\/td><\/tr><tr><td>Rated Capacity<\/td><td>_____ kVA \/ MVA<\/td><\/tr><tr><td>HV \/ LV Voltage<\/td><td>_____ kV \/ _____ V<\/td><\/tr><tr><td>Frequency<\/td><td>50 \/ 60Hz<\/td><\/tr><tr><td>Vector Group<\/td><td>__________<\/td><\/tr><tr><td>Cooling Method<\/td><td>ONAN \/ ONAF \/ AN \/ AF<\/td><\/tr><tr><td>Applicable Standard<\/td><td>IEC \/ IEEE \/ Utility<\/td><\/tr><tr><td>Routine FAT Tests<\/td><td>Required Scope<\/td><\/tr><tr><td>Type \/ Special Tests<\/td><td>Specify if Required<\/td><\/tr><tr><td>FAT Witnessing<\/td><td>Buyer \/ Third Party \/ Remote<\/td><\/tr><tr><td>FAT Acceptance Criteria<\/td><td>Standard and Contract Reference<\/td><\/tr><tr><td>FAT Report Language<\/td><td>__________<\/td><\/tr><tr><td>Test Report Submission Date<\/td><td>__________<\/td><\/tr><tr><td>Transport Inspection<\/td><td>Required \/ Not Required<\/td><\/tr><tr><td>SAT Test Scope<\/td><td>Approved Procedure<\/td><\/tr><tr><td>SAT Test Instruments<\/td><td>Supplier \/ EPC \/ Third Party<\/td><\/tr><tr><td>Site Technical Support<\/td><td>Remote \/ On-Site<\/td><\/tr><tr><td>Installation Responsibility<\/td><td>__________<\/td><\/tr><tr><td>Commissioning Responsibility<\/td><td>__________<\/td><\/tr><tr><td>Energization Authorization<\/td><td>__________<\/td><\/tr><tr><td>Nonconformity Procedure<\/td><td>__________<\/td><\/tr><tr><td>Quantity<\/td><td>_____ Units<\/td><\/tr><tr><td>Delivery Deadline<\/td><td>__________<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-ae5b2c60\"><span class=\"ez-toc-section\" id=\"Documents_to_Attach_to_the_RFQ\"><\/span>Documents to Attach to the RFQ<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Transformer technical specification<\/li>\n\n\n\n<li>Single-Line Diagram (SLD)<\/li>\n\n\n\n<li>General Arrangement Drawing requirements<\/li>\n\n\n\n<li>Inspection and Test Plan (ITP)<\/li>\n\n\n\n<li>FAT test and acceptance requirements<\/li>\n\n\n\n<li>SAT and commissioning specification<\/li>\n\n\n\n<li>Protection and control interface requirements<\/li>\n\n\n\n<li>Project-site environmental information<\/li>\n\n\n\n<li>Shipping and unloading requirements<\/li>\n\n\n\n<li>Required technical documentation list<\/li>\n\n\n\n<li>Witness inspection requirements<\/li>\n\n\n\n<li>Project delivery and commissioning schedule<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b34ecdfa\">For projects in Ukraine, Ethiopia, Vietnam, Thailand, Myanmar, Uzbekistan, Russia, and Nigeria, buyers should also identify the relevant utility, EPC contractor, and authorized commissioning organization.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-325eb87c\"><span class=\"ez-toc-section\" id=\"10_DHDL_Transformer_Testing_and_Quality_Control\"><\/span>10. DHDL Transformer Testing and Quality Control<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-eb2dc235\">DHDL manufactures oil-immersed transformers, <strong><em><a href=\"https:\/\/dinghongtransformer.com\/vi\/product-category\/transformers\/dry-type-transformer\/\" data-type=\"product_cat\" data-id=\"76\">dry-type transformers<\/a><\/em><\/strong>, <em><strong><a href=\"https:\/\/dinghongtransformer.com\/vi\/product\/pangu-power-diesel-generator-set\/\" data-type=\"product\" data-id=\"38823\">power transformers<\/a><\/strong><\/em>, and related distribution equipment.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f94b4aa2\">According to its published manufacturing information, the company controls processes including winding, insulation preparation, assembly, and routine factory testing.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-06e02abc\">Its stated testing activities include transformer ratio, winding DC resistance, insulation, withstand-voltage, and loss measurements. Technical files, test reports, installation guidance, and remote support are also described on its website. Dinghongtransformer<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-20fcf5c3\">For project-specific orders, buyers should confirm the FAT scope, required reports, witness arrangements, and any SAT support in the technical agreement.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1f5ee4f4\">DHDL&#8217;s existing article on factory acceptance testing provides further guidance on inspections before shipment. Dinghongtransformer<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-308f3dbc\">A complete transformer RFQ should include:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-db381d34\">Transformer Specifications + Applicable Standards + FAT Test List + Witness Requirements + Required Documents + SAT Scope + Destination + Delivery Schedule<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ef9b5f04\">DHDL \u2014 Transformer Manufacturing, Quality Control and Power Distribution Solutions for Global Projects.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-96e0b109\">Website: <a href=\"https:\/\/dinghongtransformer.com\/vi\/\" data-type=\"link\" data-id=\"https:\/\/dinghongtransformer.com\/\">https:\/\/dinghongtransformer.com\/<\/a><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0bbd0c91\"><a href=\"https:\/\/dinghongtransformer.com\/vi\/contact-us\/\" data-type=\"link\" data-id=\"https:\/\/dinghongtransformer.com\/contact-us\">Contact DHDL for a Transformer Quotation<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Compare transformer FAT vs SAT, including factory tests, site commissioning checks, required documents, buyer responsibilities and an RFQ checklist.<\/p>","protected":false},"author":1,"featured_media":38911,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[71,73,72],"tags":[],"class_list":["post-38910","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-studies","category-industry-standards","category-inudustry-trends"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Transformer FAT vs SAT: Testing Checklist, Required Documents &amp; 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